/* $Id: object.hg,v 1.5 2006/04/07 14:11:37 gustin Exp $ */

/* Copyright (C) 1998-2002 The gtkmm Development Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <glibmm/object.h>
#include <gtkmm/base.h>
#include <gtkmmconfig.h>
_DEFS(gtkmm,gtk)
_PINCLUDE(glibmm/private/object_p.h)

namespace Gtk
{

class Object;

/** Mark a Gtk::Object as owned by its parent container widget, so you don't need to delete it manually.
 * For instance,
 * @code
 * Gtk::Button* button = Gtk::manage( new Gtk::Button("Hello") );
 * vbox.pack_start(*button); //vbox will delete button when vbox is deleted.
 * @endcode
 *
 * @param obj A Gtk::Object, such as a gtkmm widget.
 * @result The Gtk::Object passed as the @a obj parameter.
 */
template<class T>
T* manage(T* obj)
{
  obj->set_manage();
  return obj;
}

/** Gtk::Object is the base class for all widgets, and for a few non-widget objects such as 
 * Gtk::Adjustment. Gtk::Object predates Glib::Object; non-widgets that derive from Gtk::Object 
 * rather than Glib::Object do so for backward compatibility reasons.
 *
 * The most interesting difference between Gtk::Object and Glib::Object is the ability to use Gtk::manage() to delegate memory management to the container widget. Gtk::Objects can also be 
 * explicitly deleted at any time, instead of using only reference-counting, and container widgets 
 * can respond when their child objects are being deleted (for instance by removing the widget).
 */
class GTKMM_API Object : public Glib::Object
{
  _CLASS_GTKOBJECT(Object,GtkObject,GTK_OBJECT,Glib::Object,GObject)
  _IGNORE(gtk_object_ref, gtk_object_unref, gtk_object_weakref, gtk_object_weakunref, gtk_object_set_data,
          gtk_object_set_data_full, gtk_object_remove_data, gtk_object_get_data, gtk_object_remove_no_notify,
          gtk_object_set_user_data, gtk_object_get_user_data, gtk_object_set_data_by_id, gtk_object_set_data_by_id_full,
          gtk_object_get_data_by_id, gtk_object_remove_data_by_id, gtk_object_remove_no_notify_by_id, gtk_object_get,
          gtk_object_set, gtk_object_add_arg_type, gtk_object_destroy, gtk_object_sink)
  _CUSTOM_DTOR
  _CUSTOM_CTOR_CAST

public:
  //void shutdown(); //We probably don't need this.
  //void finalize(); //We probably don't need this.

  //void set_user_data(gpointer data);
  //gpointer get_user_data();

  #ifndef DOXYGEN_SHOULD_SKIP_THIS
  /** Used by Gtk::manage(). You should not need to use this directly.
   */
  virtual void set_manage();
  #endif //DOXYGEN_SHOULD_SKIP_THIS

  _WRAP_PROPERTY("user-data", void*)

  #ifndef DOXYGEN_SHOULD_SKIP_THIS
  /** Private API.
   */
  bool is_managed_() const;
  #endif //DOXYGEN_SHOULD_SKIP_THIS

protected:

  #ifndef DOXYGEN_SHOULD_SKIP_THIS
  /** Private API.
   */
  void destroy_();
  #endif //DOXYGEN_SHOULD_SKIP_THIS

  // If you need it, give me an example. murrayc. -- Me too. daniel.
  //_WRAP_SIGNAL(void destroy(), "destroy")
  _IGNORE_SIGNAL(destroy)

  #ifndef DOXYGEN_SHOULD_SKIP_THIS
  void _init_unmanage(bool is_toplevel = false);
  virtual void destroy_notify_(); //override.
  void disconnect_cpp_wrapper();
  void _destroy_c_instance();
  static void callback_destroy_(GObject* gobject, void* data); //only connected for a short time.

  // set if flags used by derived classes.
  bool referenced_; // = not managed.
  bool gobject_disposed_;
  #endif //DOXYGEN_SHOULD_SKIP_THIS
};

} // namespace Gtk

